They are very trim and never left redmarks! The sizing is a bit funky though. I've never tried the small or mediums, but the NB's are teeny tiny (like, wouldn't make it past 8/9 pounds!) and M/Ls rise is WAAAY to high for any baby that size, and the larges are pretty darn huge, I don't think most babies would ever need this size. My 30lb 2 year old was swimming in them.

I love her stuff. I used her AIOs when she first came out and was only selling on DS and got M w/ a custom rise for DD and they fit her PERFECTLY. Recently, I got some NB bamboo fitteds for baby boy on the way and they really *are* teeny tiny, but he's been measuring on the petite side and I wanted some perfect fit, easy dipes for the hospital. Great product, great turnaround time.